1. This project and its actions were made possible due to co-financing by the European Fund for the Integration of Third-Country Nationals Testing alkalis Subject:Science Age group:12–14 Topic:Chemistry practical EAL Nexus resource Licence information | This resource is free to use for educational purposes. © British Council 2015 Source | This resource was originally developed by Ruth Wilson and Remy Mal for Wolverhampton Local Authority and Heath Park Business and Enterprise College and has been adapted by EAL Nexus.

2. We wanted to find out which …

3. … is the strongest alkali. dilute sodium hydroxide sodium hydroxide lime water buffer

4. We measured 10ml of alkali and poured into a boiling tube.

5. We added five drops of universal indicator.

6. We observed the colour change.

7. We checked the colour chart to see what the pH was. acidalkalineutral

8. We repeated the process with all the alkalis.

9. We recorded our results in a table. SubstanceColourStrong or weak alkali? pH

10. We found out that the _______________ was stronger than the __________________. The ________________ was the strongest of all the alkalis we tested.

11. Useful connectives: First of all we … Then we … We then … After that … Next … Finally …